docs: def normalize_bbox(coords, ymax, scaler=2):
      """
      scales all coordinates and flip y axis due to different
      origin coordinates (top left vs. bottom left)
      """
      return [
          coords[0] * scaler,
          ymax - (coords[3] * scaler),
          coords[2] * scaler,
          ymax - (coords[1] * scaler),
      ]